Qwt Zoom

[simonb]

Hi all,

My curve passes a filter before I present the graph.
Because I do not want to present all the points, but I want that when I do a zoom to get a higher resolution of the points.

I currently have implementation of zoom that expands the scales.

QwtPlotZoomer* zoomer = new QwtPlotZoomer( canvas() );
    zoomer->setRubberBandPen( QColor( Qt::white ) );
    zoomer->setTrackerPen   ( QColor( Qt::white ) );
    zoomer->setMousePattern( QwtEventPattern::MouseSelect2,
        Qt::RightButton, Qt::ControlModifier );
    zoomer->setMousePattern( QwtEventPattern::MouseSelect3,
        Qt::RightButton );

QwtPlotZoomer* zoomer = new QwtPlotZoomer( canvas() );
    zoomer->setRubberBandPen( QColor( Qt::white ) );
    zoomer->setTrackerPen   ( QColor( Qt::white ) );
    zoomer->setMousePattern( QwtEventPattern::MouseSelect2,
        Qt::RightButton, Qt::ControlModifier );
    zoomer->setMousePattern( QwtEventPattern::MouseSelect3,
        Qt::RightButton );

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I want to add to the implementation the possibility of drawing more points.
My question is there code already prepared to do it?
If not, for a start will help me to know how to get the values ​​of X axis when the user selected era to zoom.

My setup
Qt 4.7.0
QwtPlot 6.0.0
Windwos XP SP3 (32bit)



I

[sonulohani]

Hey, you previously asked this thing and you again and again posting the same question. Ask only in one thread.